/*
 * Licensed to the Apache Software Foundation (ASF) under one or more
 * contributor license agreements.  See the NOTICE file distributed with
 * this work for additional information regarding copyright ownership.
 * The ASF licenses this file to You under the Apache License, Version 2.0
 * (the "License"); you may not use this file except in compliance with
 * the License.  You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package io.microsphere.spring.util;

import org.springframework.beans.factory.config.BeanDefinition;
import org.springframework.beans.factory.support.RootBeanDefinition;
import org.springframework.lang.Nullable;
import org.springframework.util.StringUtils;

import java.lang.reflect.Method;

import static io.microsphere.util.ClassLoaderUtils.getClassLoader;
import static io.microsphere.util.ClassLoaderUtils.getDefaultClassLoader;
import static io.microsphere.util.ClassLoaderUtils.resolveClass;

/**
 * {@link BeanDefinition} Utilities class
 *
 * @author <a href="mailto:mercyblitz@gmail.com">Mercy</a>
 * @since 1.0.0
 */
public abstract class BeanDefinitionUtils {

    public static Class<?> resolveBeanType(RootBeanDefinition beanDefinition) {
        return resolveBeanType(beanDefinition, getDefaultClassLoader());
    }

    public static Class<?> resolveBeanType(RootBeanDefinition beanDefinition, @Nullable ClassLoader classLoader) {
        Class<?> beanClass = null;

        Method factoryMethod = beanDefinition.getResolvedFactoryMethod();
        if (factoryMethod == null) {
            if (beanDefinition.hasBeanClass()) {
                beanClass = beanDefinition.getBeanClass();
            } else {
                String beanClassName = beanDefinition.getBeanClassName();
                if (StringUtils.hasText(beanClassName)) {
                    ClassLoader targetClassLoader = classLoader == null ? getDefaultClassLoader() : classLoader;
                    beanClass = resolveClass(beanClassName, targetClassLoader, true);
                }
            }
        } else {
            beanClass = factoryMethod.getReturnType();
        }
        return beanClass;
    }


}
